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Last name Каус (Kaus , Cayu , Каус ) , all over the world, is quite a common family name. The cognomen Каус is habitual in Estonia, where it is quite a common surname, Germany, where it is quite a rare surname, and Norway. Not in comparison with a country's population, it is commonest in Germany, the United States, and Argentina. Very seldom, Каус is the forename as well as the last name.